Turn-table



(No Model.)

13H. SAYLOR.

TURN TABLE.

Paten te d Jan.' 15, 1889.

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UNIT D STATES PATENT FFIcE.

FRANCIS H. SAYLOR, OF PHILADELPHIA, PENNSYLVANIA.

TU RN-TABLE.

SPECIFICATION forming part Of Letters Patent N0. 396,118, dated January 15, 1889.

Application fil December 1,1887. Serial No. 256,647. (No model.)

the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improved Turn-Table, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to that class of turntables in which the leveling and adjusting of the table is accomplished by altering the position of its trailing wheels and without necessarily moving the point or points of support 011 which the table rests at its center.

My object is to provide the bearings of the adjustable trailing wheels with adjustable supports intervening between said bearings and the supported structure, which said supports shall be as strong and simple as would be the case did they form a permanent part of the structure, and to so construct and organize the table as a whole as to make it at the same time more simple, strong, and easily adjusted than is usually the case.

My invention consists in making the trailing wheels; in combining in the table, ashereinafter described, the feature of a central pivotal support, upon which the main girders rest directly and without the intervention of adjusting-screws, beams, or struts for supporting the trailing wheels, formed so as to extend across and to each side of the main girders, and adjusting devices for changing the position of the trailing wheels, consisting of one or more solid plates arranged to beinterposed between the beam and wheels, so as to form a solid base or support.

My preferred device for adjusting the trailing wheels consists of securing a number of independently-removable fiat plates between the journahboxes of the wheels and the channel strut which carries them, said plates cor 'esponding in size to the flat surface of the journal-box and being perforated to permit bolts to pass through them, as is shown in the drawings. These plates, being removable, can be inserted or withdrawn at pleasure, and the adjustment of the table thus easily accomplished, while at the same time they afford a solid and substantial support for the wheels when in use.

Reference is now had to the drawings, which illustrate my invention, and in which Figure 1 is a side elevation of the turn-table in position; Fig. 2, a plan view of the same; Fig. 3, an end view; Fig. 4:, a side elevation of one end, showing my improved adjusting device. Fig. 5 is a cross-section of the table at its center, showing its supporting and revolving mechanism; Fig. 6, a longitudinal section of the supporting device of the table. Fig. 7 is a perspective view of one of the thin plates inserted between the journal-boxes of the trailing wheels and the channel-strut, and Fig. 8 illustrates a modified device for adjusting the trailing wheels.

A A are the main girders of the table.

15 is the pivot and support on which the table rests at its center.

C is the pit in which the table is placed.

D is the circular track on which the trailing wheels run.

E E are the trailing-wheels; F F, the channel-struts at the ends of the table, to which the j ournal-boxes of the trailing wheels are secured.

G G, &c., are the j ournal-boxes of wheels E.

l[ are the thin iron plates, which I preferably use to adjust the height of the trailing wheels. These plates are provided with holes 71V 71, (see Fig. 7,) through which the bolts I I, &c., pass. These bolts serve to secure the journal-boXes G to the channel-struts F.

.l are ties on which the rails K rest.

At 'L and M is represented the framing by which the table at its center is secured on the supporting-plate N, which in turn rests 011 the curved surface 0 of plate 0. All these parts of the structure, together with the key-block foundation U, are fully described in my be fore-mentioned patent, and as they in themselves forln no part of this invention they need not be further described.

In Fig. 8 the trailing wheels E are shown as attached to journal-boxes G, which have slots g formed in their prolonged sides, by which they are adjustably secured on the channels F by means of bolts 1. In this view a wedge, H, with a nut and screw, H,

to move it, is shown as the device for moving the bearings G up and down.

It will be observed that the table proper rests directly on the pivotal support without the intervention of adj listing-screws, and that the beam or channel-struts F extend continuonslyacross the main girders and out on each side thereof, the bearings carrying the trail ing wheels being secured to their projecting ends, and the plate or plates serving as the adjusting device being situated between the ends of the beams and the \vheeLbearings, the whole arrangement being at the same time most simple and most effective and no part being liable to get out of order. In tables made without central adj ustin gserews much trouble has heretofore been t'oun d in effecting a proper adjustment, and to properly adjust a table by its trailing wheels it is necessary that they 5 should be structurally united to the main Q girders in the most rigid and secure manner,

which requirement is fully met by the construction shown, in which the beams or girders F pass completely across and are firmly riveted to the main girders, while the adjust ing'plates altord as firm a support for the wheel-bearings as it they were bolted directly to the supporting-beams.

From the foregoing descri ition the mode of use of my device is at once understood. The table is placed on its fixed pivotal support 13, and then adjusted in its pit, adjusting my supporting plate or plates so that they will sustain the journals of the trailing wheels in propel-position. This can be easily done also at any time when the table gets out of adjustment. Vhen the device of thin plates H is employed, these plates, when clamped between the channel-irons F and journal -boxes G by the bolts I passing through their holes 71 afford a most solid sup port for the wheels, and this plan is besides the simplest and cheapest, and for all of these reasons is preferred by me, though the use of a wedge, as in Fig. 8, has some obvious merits.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a turntable, the combination, with the central pivoted support, of the main girders arranged to rest upon it without the interposition of adj usting-serews, beams, or struts F at each end of the main girders, said beams extending continuously across and on each side of the girders and being firmly riveted thereto, the trailing wheels having journalboxes, and one or more movable plates interposed between the journal-boxes and the projecting ends of the beams F, so that each wheel can be independently adjusted without interfering with the solidity of its attachment to the table, all substantially as and for the purpose specified.

FRANCIS ll. SAYLOR.

\Vitnesses:

LISLE sToKEs, Fnimcis T. CHAMBERS. 

